HD6432142 datasheet(728/1177 Pages) RENESAS

728 / 1177 page

Section 22 ROM (Mask ROM Version, H8S/2148 F-ZTAT, H8S/2147N F-ZTAT, H8S/2144 F-ZTAT, and H8S/2142 F-ZTAT)

Rev. 4.00 Sep 27, 2006 page 684 of 1130

REJ09B0327-0400

Do not use interrupts while flash memory is being programmed or erased.

All interrupt requests, including NMI, should be disabled to give priority to program/erase

operations.

Do not perform additional programming. Erase the memory before reprogramming.

In on-board programming, perform only one programming operation on a 32-byte programming

unit block. In programmer mode, too, perform only one programming operation on a 128-byte

programming unit block. Programming should be carried out with the entire programming unit

block erased.

Before programming, check that the chip is correctly mounted in the PROM programmer.

Overcurrent damage to the device can result if the index marks on the PROM programmer socket,

socket adapter, and chip are not correctly aligned.

Do not touch the socket adapter or chip during programming.

Touching either of these can cause contact faults and write errors.

22.12

Note on Switching from F-ZTAT Version to Mask ROM Version

The mask ROM version does not have the internal registers for flash memory control that are

provided in the F-ZTAT version. Table 22.22 lists the registers that are present in the F-ZTAT

version but not in the mask ROM version. If a register listed in table 22.22 is read in the mask

ROM version, an undefined value will be returned, Therefore, if application software developed

on the F-ZTAT version is switched to a mask ROM version product, it must be modified to ensure

that the registers in table 22.22 have no effect.

Table 22.22 Registers Present in F-ZTAT Version but Absent in Mask ROM Version

Abbreviation

Address

Flash memory control register 1

FLMCR1

H'FF80

Flash memory control register 2

FLMCR2

H'FF81

Erase block register 1

EBR1

H'FF82

Erase block register 2

EBR2

H'FF83

HD6432142 Datasheet(PDF) 728 Page - Renesas Technology Corp